Final answer:
The pectoral girdle is responsible for connecting the arms to the axial skeleton through the clavicle and scapula bones.
Step-by-step explanation:
The pectoral girdle provides support and points of attachment for the upper limbs of the human body. In particular, the pectoral girdle bones, which include the clavicle (collarbone) and the scapula (shoulder blades), facilitate the connection of the arms to the axial skeleton. This structure enables a range of movements and is crucial for the mechanical support that allows us to perform activities involving our arms. Therefore, the pectoral girdle supports the arms.